Variable length private key generator and method thereof

Details Variable length private key generator and method thereof Variable length private key generator and method thereof

2011-04-19

2011-04-19

Smithers, Matthew B (Department: 2437)

Cryptography

Key management

Having particular key generator

C380S042000, C380S047000, C380S277000, C398S167500

Reexamination Certificate

active

07929694

ABSTRACT:
The present invention relates to a variable length private key generator. According to one embodiment, the variable length private key generator includes a permuter. The permuter is configured to generate a key stream of a desired length by permuting a plurality of shift registers. The permuter includes the plurality of shift registers, a plurality of clocking modules, and/or an output module. Each clocking module corresponds to a different one of the plurality of shift registers and is configured to generate a clocking signal based on selected bits of the corresponding shift register. The output module is configured to output the key stream based on at least one clocking signal and output of at least one of the plurality of shift registers.

REFERENCES:
patent: 5297207 (1994-03-01), Degele
patent: 2003/0072059 (2003-04-01), Thomas et al.
patent: 1223707 (2002-07-01), None
Speidel, Ulrich; Gulliver, T. Aaron; “A secure authentication system based on variable-length codes”, Information Theory and its Applications (ISITA), 2010 International Symposium on Digital Object Identifier: 10.1109/ISITA.2010.5649672, Publication Year: Oct. 2010 , pp. 684-689.

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